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| Progress in Non-Destructive Testing and Evaluation of SiCf /SiC Composites |
| LIU Songping, LIU Feifei, ZHANG Qingle, LI Zhiying |
| ( Composites Technology Center, AVIC Manufacturing Technology Institute, Beijing 101300, China ) |
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Abstract As silicon carbide fibre/silicon carbide ceramicmatrix composites (SiCf/SiC CMCs) have become widely used in high temperature hot-section components in aerospace and aero-engines, nondestructive testing and evaluation (NDT & E) is particularly important. Due to the special high temperature manufacturing process, internal microstructure and defect characteristics of SiCf/SiC CMCs, it is difficult to realize reliable NDT & E of SiCf/SiC CMCs by using existing detection techniques and defect evaluation methods. Based on the studies in this field in the recent years, the defects and characteristics of SiCf/SiC CMCs are analyzed. The research progress in NDT&E of SiCf/SiC CMCs is reviewed. The main technical challenges in NDT&E of SiCf/SiC CMCs are presented. The future development tendency in NDT & E of SiCf/SiC CMCs is given. At present, high-resolution digital X–ray imaging and high-resolution asymmetric-frequency ultrasonic detection techniques have become very important methods for the NDT & E of SiCf/SiC CMCs, and good practical testing and applications have been obtained.
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2020, 
